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BHU PMT BHU PMT (Screening) Solved Paper-2008

  • question_answer
    Assertion : The ionic size of\[M{{g}^{2+}}>A{{l}^{3+}}\] Reason (R): In isoelectronic species, greater the nuclear charge, less is the size.

    A)  A and R both are correct and R is the correct explanation of A.

    B)  A and R both are correct but R is not the correct explanation of A.

    C)  A is incorrect while R is correct.

    D)  A and R both are incorrect.

    Correct Answer: A

    Solution :

                     The ionic size of\[M{{g}^{2+}}\] is larger than\[A{{l}^{3+}}\]. Both species are isoelectronic, in case of isoelectronic species as nuclear charge increases, attraction force between electron of ultimate shell and nucleus increases which results decrease in ionic size.


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